﻿#region Copyright (c) 2006-2012 nHydrate.org, All Rights Reserved
// --------------------------------------------------------------------- *
//                           NHYDRATE.ORG                                *
//              Copyright (c) 2006-2012 All Rights reserved              *
//                                                                       *
//                                                                       *
// This file and its contents are protected by United States and         *
// International copyright laws.  Unauthorized reproduction and/or       *
// distribution of all or any portion of the code contained herein       *
// is strictly prohibited and will result in severe civil and criminal   *
// penalties.  Any violations of this copyright will be prosecuted       *
// to the fullest extent possible under law.                             *
//                                                                       *
// THE SOURCE CODE CONTAINED HEREIN AND IN RELATED FILES IS PROVIDED     *
// TO THE REGISTERED DEVELOPER FOR THE PURPOSES OF EDUCATION AND         *
// TROUBLESHOOTING. UNDER NO CIRCUMSTANCES MAY ANY PORTION OF THE SOURCE *
// CODE BE DISTRIBUTED, DISCLOSED OR OTHERWISE MADE AVAILABLE TO ANY     *
// THIRD PARTY WITHOUT THE EXPRESS WRITTEN CONSENT OF THE NHYDRATE GROUP *
//                                                                       *
// UNDER NO CIRCUMSTANCES MAY THE SOURCE CODE BE USED IN WHOLE OR IN     *
// PART, AS THE BASIS FOR CREATING A PRODUCT THAT PROVIDES THE SAME, OR  *
// SUBSTANTIALLY THE SAME, FUNCTIONALITY AS THIS PRODUCT                 *
//                                                                       *
// THE REGISTERED DEVELOPER ACKNOWLEDGES THAT THIS SOURCE CODE           *
// CONTAINS VALUABLE AND PROPRIETARY TRADE SECRETS OF NHYDRATE,          *
// THE REGISTERED DEVELOPER AGREES TO EXPEND EVERY EFFORT TO             *
// INSURE ITS CONFIDENTIALITY.                                           *
//                                                                       *
// THE END USER LICENSE AGREEMENT (EULA) ACCOMPANYING THE PRODUCT        *
// PERMITS THE REGISTERED DEVELOPER TO REDISTRIBUTE THE PRODUCT IN       *
// EXECUTABLE FORM ONLY IN SUPPORT OF APPLICATIONS WRITTEN USING         *
// THE PRODUCT.  IT DOES NOT PROVIDE ANY RIGHTS REGARDING THE            *
// SOURCE CODE CONTAINED HEREIN.                                         *
//                                                                       *
// THIS COPYRIGHT NOTICE MAY NOT BE REMOVED FROM THIS FILE.              *
// --------------------------------------------------------------------- *
#endregion
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;

namespace nHydrate.Dsl.Design.Converters
{
	internal class TextDecimalScaleConverter : TypeConverter
	{
		public TextDecimalScaleConverter()
		{
		}

		public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
		{
			if (destinationType == typeof(string)) return true;
			return base.CanConvertTo(context, destinationType);
		}

		public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
		{
			try
			{
				if (destinationType == typeof(string))
				{
					var retval = string.Empty;
					if (context.Instance is nHydrate.Dsl.Field)
					{
						var column = context.Instance as nHydrate.Dsl.Field;
						if (column.DataType.GetPredefinedScale() != -1)
							retval = "undefined";
						else
							retval = column.Scale.ToString();
					}
					else if (context.Instance is nHydrate.Dsl.StoredProcedureField)
					{
						var column = context.Instance as nHydrate.Dsl.StoredProcedureField;
						if (column.DataType.GetPredefinedScale() != -1)
							retval = "undefined";
						else
							retval = column.Scale.ToString();
					}
					else if (context.Instance is nHydrate.Dsl.StoredProcedureParameter)
					{
						var column = context.Instance as nHydrate.Dsl.StoredProcedureParameter;
						if (column.DataType.GetPredefinedScale() != -1)
							retval = "undefined";
						else
							retval = column.Scale.ToString();
					}
					else if (context.Instance is nHydrate.Dsl.ViewField)
					{
						var column = context.Instance as nHydrate.Dsl.ViewField;
						if (column.DataType.GetPredefinedScale() != -1)
							retval = "undefined";
						else
							retval = column.Scale.ToString();
					}

					return retval;
				}
			}
			catch (Exception ex) { }
			return null;
		}

		public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
		{
			if (context.Instance is nHydrate.Dsl.Field)
			{
				var column = context.Instance as nHydrate.Dsl.Field;
				if (sourceType == typeof(string))
					return true;
				else if (sourceType == typeof(int))
					return true;
				else
					return false;
			}
			else if (context.Instance is nHydrate.Dsl.StoredProcedureField)
			{
				var column = context.Instance as nHydrate.Dsl.StoredProcedureField;
				if (sourceType == typeof(string))
					return true;
				else if (sourceType == typeof(int))
					return true;
				else
					return false;
			}
			else if (context.Instance is nHydrate.Dsl.StoredProcedureParameter)
			{
				var column = context.Instance as nHydrate.Dsl.StoredProcedureParameter;
				if (sourceType == typeof(string))
					return true;
				else if (sourceType == typeof(int))
					return true;
				else
					return false;
			}
			else if (context.Instance is nHydrate.Dsl.ViewField)
			{
				var column = context.Instance as nHydrate.Dsl.ViewField;
				if (sourceType == typeof(string))
					return true;
				else if (sourceType == typeof(int))
					return true;
				else
					return false;
			}
			return false;
		}

		public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
		{
			if (value is string)
			{
				int v;
				if (int.TryParse(value.ToString(), out v))
				{
					return v;
				}
			}
			return 0;
		}

	}
}
